DE2721276A1 - Continuous counting of electrical pulses by moving average - involves two=way counter with divider fed from reference frequency - Google Patents

Continuous counting of electrical pulses by moving average - involves two=way counter with divider fed from reference frequency

Info

Publication number
DE2721276A1
DE2721276A1 DE19772721276 DE2721276A DE2721276A1 DE 2721276 A1 DE2721276 A1 DE 2721276A1 DE 19772721276 DE19772721276 DE 19772721276 DE 2721276 A DE2721276 A DE 2721276A DE 2721276 A1 DE2721276 A1 DE 2721276A1
Authority
DE
Germany
Prior art keywords
counter
pulse train
measured
divider
digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19772721276
Other languages
German (de)
Inventor
Dieter Prof Dr Ing Filbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heliowatt Werke Elektrizitaet GmbH
Original Assignee
Heliowatt Werke Elektrizitaet GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heliowatt Werke Elektrizitaet GmbH filed Critical Heliowatt Werke Elektrizitaet GmbH
Priority to DE19772721276 priority Critical patent/DE2721276A1/en
Publication of DE2721276A1 publication Critical patent/DE2721276A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

The continuous counter consists of an up-down counter (Z) to whose forward counting input is connected the pulse train to be measured (fx). The data output of the counter controls a digital divider or rate multiplier (T). The divider divides the reference pulse train from a clock generator (fo) in accordance with the digital output of the counter. The resulting signal is fed to the reverse counting input of the digital counter (R). The figure appearing in the counter display (A) is the moving (exponential) average of the frequency of the pulse train being measured (fx). The average period of the pulse train can also be continuously measured if this signal is fed to the input of the divider and the reference frequency (fo) is fed to the forward counting input (V) of the digital counter.

Description

Verfahren und Anordnung zur lückenlosen Zählung elektrischer Method and arrangement for complete counting of electrical

Impulse mit gleitender Mittelung. Pulses with moving averaging.

Die Erfindung betrifft ein Verfahren und eine Anordnung zur lückenlosen Zahlung elektrischer Impulse einschließlich der Bildung eines gleitenden Mittelwertes aus den Zahlergebnissen.The invention relates to a method and an arrangement for seamless Payment of electrical impulses including the formation of a moving average from the number results.

Bei der Messung von Frequenzen und Zeiten elektrischer Impulse unter Einschluß der gleitenden Mittelung ist eine schwankende, sich schnell ändernde Anzeige der Meßwerte aufgrund der schwankenden Signalfrequenz unerwUnscht, während andererseits bei Schwankungen einer Meßgröße das Erkennen der Richtungsänderung und gegebenenfalls die Geschwindigkeit der Änderung erwünscht ist.When measuring frequencies and times electrical impulses under Inclusion of the moving average is a fluctuating, rapidly changing display the measured values are undesirable due to the fluctuating signal frequency, while on the other hand in the event of fluctuations in a measured variable, the recognition of the change in direction and, if necessary the speed of change is desired.

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung für die lückenlose Zählung elektrischer Impulse zu schaffen, die die vorgenannten Kriterien erfüllt.The invention is based on the object of an arrangement for the gapless Create counting electrical impulses that meets the aforementioned criteria.

Diese Aufgabe ist durch die Erfindung, wie sie in den kennzeichnenden Merkmalen der Patentansprüche dargelegt ist, gelöst.This object is achieved by the invention as set out in the characterizing Features of the claims is set forth, solved.

Das Blockschaltbild zeigt das Prinzip der Erfindung, das nachfolgend naher erläutert wird.The block diagram shows the principle of the invention, which follows will be explained in more detail.

Die zu messende Impulsfolge fx wird an den vorwörtszählenden Eingang V eines Vorwärts-Rückwarts-Digital zahlers Z gelegt. Das Datenwort am Ausgang des Zählers Z steuert einen digitalen Teiler T (z.B. ein Rate-Multiplier).The pulse train to be measured fx is sent to the pre-counting input V of a forward-backward digital counter Z placed. The data word at the output of the Counter Z controls a digital divider T (e.g. a rate multiplier).

Der Teiler T teilt die feste Vergleichsimpulsfolge fo einer zweiten Impulsfolge, die aus einem Taktgenerator geliefert wird, gemäß dem vom Digitalzähler Z gelieferten digitalen Wert. Die so entstandene Impulsfolge wird dem rückwärtszählenden Eingang R des Vorwärts-Rückwättt-Digital zählers Z zugeführt.The divider T divides the fixed comparison pulse sequence fo a second Pulse train delivered from a clock generator according to that from the digital counter Z supplied digital value. The resulting pulse sequence becomes the one that counts backwards Input R of the forward-backward digital counter Z supplied.

Das Datenwort am Anzeigeausgang des Digitalzählers Z ist der gleitende (exponentielle) Mittelwert der Frequenz der zu messenden Impulsfolge fx.The data word at the display output of the digital counter Z is the sliding one (exponential) mean value of the frequency of the pulse train to be measured fx.

Dieser kann ziffernmäßig einer Anzeigeeinrichtung A übermittelt oder als kodiertes Datenwort ausgegeben werden.This can be transmitted numerically to a display device A or can be output as a coded data word.

Da die Messung mit der Meßeinrichtung gemäß der Erfindung fortlaufend durchgeführt wird, handelt es sich um eine lückenlose Messung der mittleren Frequenz einer Impulsfolge. Somit werden wahrend der gesamten Meßzeit samtliche auftretenden Impulse einer zu messenden Impulsfolge fx ausgewertet.Since the measurement with the measuring device according to the invention is continuous is carried out, it is a complete measurement of the mean frequency a pulse train. Thus, all occurring during the entire measurement time Pulses of a pulse train to be measured fx are evaluated.

In gleicher Weise ist auch die mittlere Periodendauer einer Impulsfolge fx lückenlos meßbar, wenn diese an den Eingang des Teilers T und die Vergleichsimpulsfolge fo an den Vorwärtseingang V des Digitalzahlers Z gelegt werden.The mean period of a pulse train is the same fx can be measured without gaps if this is applied to the input of the divider T and the comparison pulse train fo can be applied to the forward input V of the digital counter Z.

Bei einer bevorzugten Ausführungsform der Erfindung wird eine Koinzidenz der Vorwärtszählimpulse mit den Ruckwartszahlimpulsen vermieden, indem den vorwärts- und den rückwartszahlenden Eingangen V, R des Digitalzählers Z ein Koinzidenzglied vorgeschaltet wird, das beispielsweise abwechselnd die Eingange V, R ansteuert.In a preferred embodiment of the invention, a coincidence the forward counting pulses with the backward counting pulses avoided by using the forward and the backward-paying inputs V, R of the digital counter Z are a coincidence element is connected upstream, which, for example, alternately controls the inputs V, R.

Durch die erfinderische Anordnung ist die Frequenz der Schwankung der digitalen Anzeige der Meßwerte herabgesetzt.The inventive arrangement is the frequency of the fluctuation the digital display of the measured values is reduced.

Ist die zu messende Größe tieffrequenten Schwankungen unterworfen, so wird bei entsprechender Einstellung der Zeitkonstante der Meßeinrichtung die Tendenz der Meßwerte angezeigt. Damit wird es im Gegensatz zu bisherigen digizahlen Meßverfahren möglich, die Änderung einer Meßgröße und die Geschwindigkeit der Änderung zu erkennen.If the quantity to be measured is subject to low-frequency fluctuations, with the appropriate setting of the time constant of the measuring device, the The tendency of the measured values is displayed. In contrast to previous digi numbers, this means that it is counted Measurement methods possible, the change of a measured variable and the speed of the change to recognize.

Aufgrund der Tatsache, daß bei diesem Meßverfahren der gleitende Mittelwert gebildet wird, kann die Auflösung des angezeigten Mittelwertes höher sein als das durch die Zeitquantelung, die durch die Vergleichsfrequenz des verwendeten Taktgenerators gegeben ist, möglich ware.Due to the fact that in this measurement method the moving average is formed, the resolution of the displayed mean value can be higher than that by the time quantization, which is determined by the comparison frequency of the clock generator used given is possible.

L e e r s e i t eL e r s e i t e

Claims (2)

Paten ansprüche Verfahren und Anordnung zur luckenlosen Zählung elektrischer Impulse einschließlich der Bildung eines gleitenden Mittelwertes aus den Zählergebnissen, dadurch gekennzeichnet, daß die an den vorwärtszählenden Eingang (V) eines Digitalzahlers (Z) geführte zu messende Impulsfolge (fx) ein Datenwort bestimmten digitalen Wertes am Ausgang des Digitalzählers (Z) erzeugt, das in einem Teiler (T) eine feste Vergleichsimpuisfolge (fo) in eine neue Impulsfolge unterteilt, die zur Erzielung eines gleitenden Mittelwertes der Frequenz der zu messenden Impulsfolge (fx) am Anzeigeausgang des Digitalzahlers (Z) dessen rückwärts zählenden Eingang (R) zugeführt wird. Patent claims Process and arrangement for gapless counting of electrical Impulses including the formation of a moving average value from the counting results, characterized in that the up-counting input (V) of a digital counter (Z) guided pulse train to be measured (fx) a data word with a specific digital value generated at the output of the digital counter (Z), which in a divider (T) a fixed comparison pulse sequence (fo) divided into a new pulse train, which is used to achieve a moving average the frequency of the pulse train to be measured (fx) at the display output of the digital counter (Z) whose downward counting input (R) is fed. 2) Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß durch Anlegen der zu messenden Impulsfolge (fx) an den Teiler (T) und der Vergleichsimpulsfolge (fo) an den vorwärts zählenden Eingang des Digitalzählers (Z) die mittlere Periodendauer der zu messenden Impulsfolge (fx) lückenlos meßbar ist, 3) Anordnung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß durch Vorschalten eines Koinzidenzgliedes an die Zählereingdnge des Di9italzahlers (Z) eine Koinzidenz der Vorwärts- mit den Rückwärtszählimpulsen unterbunden ist. 2) Arrangement according to claim 1, characterized in that by applying the pulse train to be measured (fx) to the divider (T) and the comparison pulse train (fo) to the up-counting input of the digital counter (Z) the mean period duration the pulse sequence (fx) to be measured can be measured without gaps, 3) arrangement according to claim 1 and 2, characterized in that by connecting a coincidence element upstream the counter inputs of the digital counter (Z) a coincidence of the forward and the Down counting pulses is prevented.
DE19772721276 1977-05-09 1977-05-09 Continuous counting of electrical pulses by moving average - involves two=way counter with divider fed from reference frequency Withdrawn DE2721276A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772721276 DE2721276A1 (en) 1977-05-09 1977-05-09 Continuous counting of electrical pulses by moving average - involves two=way counter with divider fed from reference frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772721276 DE2721276A1 (en) 1977-05-09 1977-05-09 Continuous counting of electrical pulses by moving average - involves two=way counter with divider fed from reference frequency

Publications (1)

Publication Number Publication Date
DE2721276A1 true DE2721276A1 (en) 1978-11-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941697A1 (en) * 1979-10-15 1981-04-30 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen Measuring frequency of pulse series by summation - using defined time increments and comparison with summation limit value
DE3123178A1 (en) * 1980-10-13 1982-05-13 Hugo Dr. Dipl.-Ing. 8031 Gilching Borst Digital measurement converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941697A1 (en) * 1979-10-15 1981-04-30 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen Measuring frequency of pulse series by summation - using defined time increments and comparison with summation limit value
DE3123178A1 (en) * 1980-10-13 1982-05-13 Hugo Dr. Dipl.-Ing. 8031 Gilching Borst Digital measurement converter

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